Sergio, seems like no matter what anyone says you want to shut them down.
Argentina offers:
1) People are active and social and are extremely good nature from my experience. Whether you want to be more of a hermit, or live a vibrant social life is up to you.
2) equal or lower cost of living than in North America.
a) if you are from a place where housing is expensive, the it is likely to be lower cost in Argentina.
Going to restaurants became more expensive, but rent, utilities, food to eat at home are cheaper.
There is also more to the country than just Buenos Aires.
3) The weather is quite good.
4) It is well insulated from all the politics, war and everything else going on in the world.
5) The cities and culture are designed and functional for a nice balance and quality of life. I don't know where you are from, but to have parks, plazas, third party spaces where you can go and hang out alone or with friends is pretty nice.
6) The landscape of the country is gorgeous. If you enjoy road trips, traveling, camping etc there is a fair bit to explore. And extending travel to Brazil, Chile and other parts of South America is not difficult.
7) From my experience Health Care is very good, responsive, available etc here compared to other places and great coverage with insurance. Without insurance it may or may not cost more depending on what your needs are. But without a local insurance, you can still get your global or regional insurance that should still be cheaper than in the US (not sure the difference it will offer vs medicare/medicaid).
8) Others may disagree, but I see an economy that is improving, and some of the things that were expensive are becoming relatively less so with changes in policy. So the future in my opinion looks more promising here, than it does in many other parts of the world.
Like others have said, its not just the dollars, but quality of life etc. But even if it was dollars, if you really had to live on the basics, I don't know the details of social security, but I would find it hard to believe that it couldn't stretch to cover, considering how Argentinians are able to make it (health insurance being the one exception, unless/until permanent residency is attained if you decided to make Argentina a permanent home). So again it comes down to individual selection.